Name the American actor, film producer and environmentalist activist who co-wrote the '11th Hour', a 2007 documentary film about the state of the natural environment, distributed by Warner Independent Pictures?
Leonardo DiCaprio
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Section::::Abstract.
The 11th Hour (2007 film)
12165949
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Section::::Abstract.
The 11th Hour (2007 film)
12165949
-1
Section::::Abstract.
Leonardo DiCaprio
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